/Engine/Source/Runtime/NullDrv/Public/NullRHI.h
Cancels an async reallocation for the specified texture. This should be called for the new texture, not the original.
Reallocation status
virtual ETextureReallocationStatus RHICancelAsyncReallocateTexture2D ( FRHITexture2D * Texture2D, bool bBlockUntilCompleted )